patterson



W. H. PATTERSON PERPETUAL CALENDAR 2 Filed April 2o. 1923 Fig PatentedMay 6, 1924.

UNITED Vsra'rss y l l1,493,378 PATENT `ormoni.

WILLIAM n.. PATTERSON, vor: MERION, PENNSYLVANIA.

PERPETUAL CALENDAR.

Application filed April 20, 1923. `Serial No. 633,483.

To all whom, t may concern: E.,

Be it known that I, IVILLIAM H. Pa'r'nansoN, a citizen of the UnitedStates, yresiding in Merion, Pennsylvania., haveinvented a PerpetualCalendar, of which the following is a specification. e

One object of this invention is to provide a simple, easily operateddevice forquickly ascertaining the day of the week of anyparticularly'date in'fany,l century, from the beginning of or priortothe ChristianA era,- the device being 'designed to` give correctresults both for dates 'of the old or Julian calendar as well as forthose of the or Gregorian calendar. e V

These objects and other advantageous ends I attain as hereinafter set'forth, reference being had to the accompanying drawings, in which, l" fY Fig. l is a front elevation ofa perpetual calendar constructed inaccordance with my invention; and,

Figs. 2 and 3 are vertical and horizontal sections taken respectivelyonthelines 52X-2 and 3-3 of Fig. l.

While my device may be embodied'infany of a number of different forms, Ivhave found it convenient `to make it as shown'in the above drawings, inwhichv l represents 'a backing in the form of a'atlb'ody' of metal,wood,ipasteboard, paper 'or other piece 0f sufficiently stiffsheetmaterial. This backing is preferably of'elongated'rectangularoutline and along its `longitudinal side edges is provided with guidesinthe form of strips 'S3-2. F astened to the `vouter faces of thesestrips and extending across the space between' them is a cover oftransparent sheet material such as celluloid, glass or the like, held tothe strips 2,-2 and to the backing 1/ by eyelets or rivets 4 4. Thistransparent coverl 3 which Ymay `be omitted withoutA departing frommyinvention has preferably the same outline as -the backing l and coactswith the same-to. de'- ine a vchamber or slideway in which are mountedthree elongated strips orslides 5,

6, and 7, completely iillingsaid chamber and movable longitudinallyrelatively to l'eaeh other. N "i The rstor Centuryf slide is dividedinto two vertically extending columns @ak and y, in the latter of whichis' placed a series l of numerals running,` consecutively from zero toseventeen and designatedby'the Asymbols 0. 5., indicatingthat thecenturies 'so present y designated have datesinfaccordance with the Iold'A system commonly known` as thel Julian system. Iny the column areplaced numerals unevenly spaced running consecutively from fifteentotwenty-one, .inclusive and 'these are designated by the symbols N.S`., indicating that in the centuries which they represent l.dates Varegiven .in ac-` cordancewith the Gregorian calendar.' f At distancesapart equal to the space occupied by seven consecutive numerals in thecolumn y, I` placeon 'the left hand guide strip2 a numberr ofarrows orpointers a and it ywill be understood that the slidef5, which is ofsuchlength as to project at either or both endsof the backl, may begripped-by the fingers of an operatorand movedflongitudinally to bringany one of the numerals, from zero to twenty-one in horizontal alignmentwith some one of said arrows or pointers-a. e

The middle or fYear slide 6 in the case illustrated, is'provided 'withfour parallel longitudinallyextending columns b, c, al, and e, -inwhich' are numerals running consecutively from zero to ninety-nine. rlheVfirst column bincludes those numerals from zero to twenty-seven, thesecond column c includes numeralsy from twenty-eight to fifty-five, vthethird'columnd hasinumerals from iftyfsix to eighty-three andA the fourthcolumnA e., numerals from eighty-four to ninety-nine.

It will be understood, however, that the number of columns and .the`number of numerals yin each column is immaterial, and I have groupedthem as shown merely'for the sake of convenience .since` Withoutdeparting from my invention,` said numerals may be disposed ,in'agreater or less number of columns; In any. case the numerals are dividedinto setsoflfour each and feach set is spaced from the 'sets verticallyadjacent to it by a distance egual to the space occupied byone'nu'meral. nv the extreme right hand side of the slide pointers orarrows .f and make the distance between adjacent pointers equal to'seven of the spaces in the lcolumns b, 0,103, and e. .For convenienceof designation, I have placed at' the top 'of .the slide 6'the wordsYear in century, L

The slide 7 is'divide'd into two vertical columns 'g and hand the iirstof these, which is 'adjacent the slide 6, containsthe names ofthe monthsof 'the year spaced at 5, I provide a series of appropriate distancesapart and with the exception of January and February of a leap yeararranged in their natural order. The names February and March are on thesame horizontal line and January and February of a leap year occur onlines immediately below those on which the same months are designatedfor years other than the leap year. It is further noted that in thiscolumn g, the months are named from the bottom upwardly, January of theleap year being at the bottom of the column and December at the topthereof.

The extreme right hand side of the slide 6 is provided with a column 7cin which is placed a third series of arrows or pointers Z and these arelikewise uniformly spaced seven units of distance apart, being designedto coact with the month names in the column g.

The column 7L of the slide 7 is designated at the top by the word Day"and contains numerals running consecutively from one at its upper end tothirty-one at its bot-tom. y

The extreme right hand guide strip 2 has upon its face the names of thedays of the week, repeated vertically for any of a number of times,there being in the case illustrated five complete sets of the same.

With a calendar constructed as above de scribed, if it should be desiredto ascertain the day of the week on which fell a certain date, forexample October 12, 1492, the century slide 5 is moved vertically untilthe numeral fourteen designating the century of the year above noted, isin horizontal alignment with any one of the arrows or pointers a.Thereafter the slide 6 is movedV up or down until the numeral 92 ishorizontally aligned with some one of the arrows or pointers f. Theslide 7 is then in turn adjusted until the name of the month, to wit,October, is in alignment withv one of the arrows Z, whereupon it will befound that the twelfth day of the mouth is immediately adjacent or inalignment with the day Friday, thus giving the desired result that thedate above given fell upon Friday.

If the year in whicha given date occurs is a leap year, and said datefalls in February for example, then the slide 7 is manipulated to bringthe month designated by L. Y. opposite one of the pointers Z, whereuponthe day of the week may be at once noted in line with the given day ofthe month.

By the arrangement and method of operation above described, my calendarwhen once set as noted has the numerals indicating the days ofthe monthall immediately adjacent the names indicating the days of the week forthe entire month. Again, it will be seen that the calendar is availablefor use in givin@ the day of the week of any date, regardless of whetherthis is given by the old or new system of reckoning.

My calendar moreover is available for use to ascertain the dav of theweek of dates prior to the Christian era, for if the given civil year B.C. of said date be subtracted from the number 1065, a ligure is obtainedwhich may be utilized as a year A. D. in the adjustment of the scales 5and 6 as above described.

From the above description it will be appreciated thatA my invention isa simple, quickly operative. accurate calendar having the widestpossible use, and it is obvious that if desired further century numeralsmay be added to the column :v in order to make it possible to ascertainthe day of the week upon which a futuredate falls.

I claim.-

l. The combination in a perpetual calendar of a supporting structure;and movable elementsmounted on said structure; one of said elementshaving century-indicating numerals, a second element having numeralsindicating the years in the century, anda third element having `thenames of the months and numerals indicating the days f of the month, thenames of the days of the week being positioned on the supportingstructure to co-operate with the numerals indicating the days of themonth.

2. The combination in a perpetual calendar of a supporting structure;and movable elements mounted on said structure, one of said elementshaving century-indicatingnumerals spaced to make the necessary al*lowance for leap years, a second element I' having numerals indicatingthe years in the century, and a third element having. the names of themonths vand numerals indicating the days of the month, the names of thedays: 0f the week being positioned on the supporting structure toco-operate with the numerals indicating the days of the month.

3. Thek combination in a perpetual calendar of a supporting structure;and movable elements mounted on said structure, one of said elementshaving century-indicating nu merals, a second element having numeralsarranged consecutively from one to ninety nine indicating the years inthe century, and a third element having the names of the months andnumerals indicating the days' of the month. the names of the days oftheweek being `iositioned on the supporting structure to co-operate withthe numerals indicativi" Hw dws of the month.

4. The combination in a perpetual calen-v dar of a sup-portingstructure; and movable elements mounted on said structure, one of saidelements having century-indicating numerals, a second element havingnumerals indicating the years in the century, and arranged in groups offour separated by sin'- gle spaces to make the necessary allowance forleap year, and a third element having the names ofthe months andnumerals indicating the days of the month, the names of the days of theweek being positioned on the supporting structure to co-operate with thenumerals indicating Jthe days of the month.

5. The combination in a perpetual calen` dar of a supporting structure;and three slides movably guided thereon, two of said slides havingcolumns of numerals respectively indicating centuries .and the years ofa century, the third slide having onev column of month names and asecond column of numerals of the days of the month; with a column of thenames of the days of the week on the supporting structure adjacent thethird slide.

6. The combination in a perpetual calendar of a supporting structure;and three slides movably guided thereon, two of said slides havingcolumns of consecutive numerals respectively indicating centuries andthe years of a century, the third slide having one column of month namesarranged consecutively in their natural order and a second column ofnumerals of the days of the month; with a column of the names of thedays of the week on the supporting structure adjacent the third slide.

7. The combination in a perpetual calendar of a backing; parallel guidestrips on the backing; a transparent cover mounted on and extendingbetween said guide strips to define a slideway; with three slidesmovable in said guideway, one of said slides having century-indicatingnumerals; the middle slide having numerals indicating the years of thecentury, and the third slide having thereon the month names and numeralsindicating the days of a month; the guide strip adj acenit said lastslide having thereon the names of the days of the week.

8. The combination in a perpetual calendar of a backing; parallel guidestrips on the backing; a transparent cover mounted on and extendingbetween said guide strips to define a slideway; with three slidesmovable in said guideway, one of said slides having century-indicatingnumerals, the middle slide having numerals indicating the years of thecentury, and the third slide having thereon the month names and numeralsindicating the days of a month, the guide strip adjacent said last slidehaving thereon the names of the days of the week, the other guide striphaving at least one pointer' for co-operation with the century numbers,the first slide having at least one pointer for cooperation with thenumerals on the second slide; and said :second slide having at least onepointer for co-operation with the month names on the third slide.

9. The combination in a perpetual calendar of a supporting structure;three movable elements mounted thereon; two columns of numerals on oneelement indicating centuries respectively of the old and new systems,the second movable element having thereon numerals indicating `the yearsof a century divided into a plurality of columns, the third movableelement having the month names and numerals indicating the days of themonth; the names of the days of the week being positioned on thesupporting structure adjacent said last movable element. y

WILLIAM H. PATTERSON.

